Lenovo t440p dual screen

Just bought a Lenovo t440p with an ultra dock, don't have nvidea bought with intel graphics.

I want to use dual monitor with displayport, not including the laptops LCD. The problem that I am having is that I can connect two monitors but they are cloned not dual monitors.

The two monitors are two 24" Dell that Ubuntu 13.10 identifies correctly but only as one under display. Where is the other one?

I tried using win8 and it works fine so there is no hardware problem.

Output of xrandr -q:

-----------------------------------
Screen 0: minimum 320 x 200, current 1920 x 1200, maximum 32767 x 32767
eDP1 connected (normal left inverted right x axis y axis) 1600x900 60.0 + 1440x900 59.9 1360x768 59.8 60.0 1152x864 60.0 1024x768 60.0 800x600 60.3 56.2 640x480 59.9
VGA1 disconnected (normal left inverted right x axis y axis)
DP1 disconnected (normal left inverted right x axis y axis)
HDMI1 disconnected (normal left inverted right x axis y axis)
DP2 connected primary 1920x1200+0+0 (normal left inverted right x axis y axis) 518mm x 324mm 1920x1200 60.0*+ 3840x1200 60.0 2560x1024 60.0 1920x1080 60.0 1600x1200 60.0 1680x1050 60.0 1280x1024 60.0 1280x960 60.0 1024x768 60.0 800x600 60.3 640x480 60.0 720x400 70.1
HDMI2 disconnected (normal left inverted right x axis y axis)
VIRTUAL1 disconnected (normal left inverted right x axis y axis)
-----------------------------------

Have tried changing but with no luck.

uname output:

-----------------------------------
Linux krilen-ThinkPad-T440p 3.11.0-18-generic #32-Ubuntu SMP Tue Feb 18 21:11:14 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux
-----------------------------------

Have also installed fedora 20 and ubuntugnome with the same results.

Is there anyone out there that can point me in the direction to get two monitor working as dual head.

Any help is appreciated, thanks in advanced.

/Krister

2

1 Answer

You have the same problem as I and others.

It seems that the problem is the ultra dock and the hardware. A short answer is that Lenovo uses MST (Multi stream) DP on the dock.

If you look at my thread at Linuxquestions you will get some more info.

/Krister

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